pinfold



(No Model.) 2 sheets-sheet 1.

A. G. PINFOLD.

MBTRONOMB.

No. 449,(335. Patented Mar. 31,1891.

IIIIII (No Model.) 2 Sheets- Sheet 2.

A. GgPINFoLD.

METRONOMB.

No. 449,635. Patented Mar. 3l, 1891.

-fnvenor UNITED STATES PATENT OFFICE.

ARTHUR GOUGH PINFOLD, OF CLECKHEATON, ENGLAND.

METRONOME.

SPECIFICATION forming part of Letters Patent No. 449,685, dated March31, 1891.

Application filed November 11, 1890. Serial No. 371,081- (No model.)

To @ZZ whom t may concern:

Be it known that I, ARTHUR GoUeH PIN- EOLD, a subject of the Queen ofGreat Britain, residing at Cleckheaton, in the county of York, England,have invented an Improved Metronome, of which the following is aspeciiication.

The object of the present invention is to provide a simple, cheap,efficient, noiseless, and readily portable metronome or instrumentcapable of being adjusted so as to oscillate any required number oftimes per minute, and which may be employed for indicating or markingdifferent times in music, or for rating and adjusting horologicalinstruments, such as watches, chronometers, rbc. The improved metronomehas n o springs, weights, escapement, wheels, or other parts which canget out of order, and it is always ready for use, as it can be placedand made to operate upon a shelf or other convenient projection, or evenupon the finger, or a special stand may be provided to support same, thewhole being capable of being inclosed in a suitable case and carriedabout the person.

In the accompanying drawings, Figure l is a side elevation, and Fig. 2 afront elevation, of a metronome constructed according to my invention.Figs. 3 and 4. are similar views showing the metronome mounted upon asuitable stand.,

My invention consists, essentially, in a curved or bent frame A, whichmay be of C form, as shown, the bottom of which is weighted, as shown atB, while on the under side of the top of such frame a suitablyshapedsupport or bearing-surface C is provided, upon which the instrumentoscillates when in operation. From the upper side of the top of theframe A a straight bar D eX- tends upward and -constitutes a slide uponwhich the sliding weight E to regulate the number of beats is mounted,such bar being marked with divisions and terms used in music, showingthe position to which the weight E must be shifted to produce the numberof beats required, the same as in metronomes of known construction.

rlhe instrument thus constructed is complete in itself, and bysuspending same by the bearing-surface C on the under side of the top ofthe curved or bent frame A upon a shelf or other convenient part, oreven upon the finger, and imparting an oscillating movement thereto,such movement will continue for a considerable period, the rate ofoscillation depending upon the position to which the sliding weight Ehas been shifted along the slide D projecting up from the top of theframe A.

The slide D may be mounted on the top of the frame A, so that it canslide through same or be folded in relation thereto when not in use,thus reducing the size of the instrument and enabling it to be moreconveniently carried about the person, either in a case or not, withoutdamaging it.

The bearing-surface C may be of curved form or a knife edge; but inorder to reduce the friction thereon to a minimum, and thereby increasethe duration of its operation for a single impulse imparted to theinstrument, it is preferable to make such bearing-surface in the form ofa pin or pins F, preferably two, as shown.

A suitable stand G maybe provided for the instrument, having preferablyat top a part or support to receive the bearing-surface C of the frame Aof such instrument, a suitable form of stand consist-ing of a set oflegs H, to or upon the top of one of which the support I to receive thebearing-surface C of the instrument is secured or mounted, as shown inFigs. 3 and 4;. The legs H constituting the stand are preferably hingedor pivoted together, so that they can be folded or turned fiat all inthe same line, and thus enable the stand and the instrument (which isalso flat) to be placed in a small case, so as to be more convenient fortransport, such case being capable of being placed in the pocket.

The support I on the standand which is to receive the bearing-surface Cof the instrument, may be of any suitable material, (metal,india-rubber, &c.,) and of any suitable form to suit the shape or natureof such bear ing-surface. lVhen the latter is convex, the support may bein the form of a corresponding concave recess, or the bearing-surfacemay be in the form of a concave recess and the support be convex. For aknife-edge bearing-surface the part to receive the knifeedge may have aslight cut or recess.

When the bearing-surface consists of two IOO pins F, the support I 'onthe stand G is, as shown in Figs. 3 and 4, preferably in the form of apulley, either grooved or not, and which may be stationaryv or mountedupon a pivot, as shown; or such support I may be in the form of a ball.This construction will enable the instrument to always hang true, evenwhen the stand is placed upon a slanting or an irregular surface.

The pins F might be arranged on the stand G and theball or roller I formthe bearingsurface of the instrument.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The improved metronome consisting of a curved or bent frame Weightedat its lower end and provided with a bearing-surface on the under sideof the top thereof bywhich it can be suspended, and a bar or slideprojecting up from the top of sueh frame and carrying a Weight theposition of which can on the under side of the vtop thereof, and a baror slide projecting up from the top of such frame and carrying anadjustable Weight, such bar or slide being capable of either slidingthrough the top of the frame or of folding down in relation thereto,substantially as specified.

ARTHUR GOUGH PINFOLD.

Witnesses:

GEO. E. MUMFORD, Solicitor and Notary Publio, of Bradford,

Yorkshire, England.

S. E. DEAN,

His Clerk.

